Forging-machine.



...L 0 4,. r.. a M d e t n e t a P E. ...Lm NH .0C TA SM N G A. Vm. .nS0 F 2 .sbaglia-sheet -L (Application filed Apr. 11, 1901.)

(No Modem muk ,w

fw. YVL. a

:rf/5555s.

No. 694,308. Patented Mar. 4, |9402 y S. VANSTDNE.

Fosms" mAcHmx-z.

(Applicasinn med Apr.'1x,' 19o1.) y (Nu Modal.) I 2 Sheets-Sheet 2.

FIEM.,

MT/x/EESES,

PATENT OFFICE.

SAMUEL VANSTONE, OF PROVIDENCE, RIODE ISLAND, ASSIGNOR TO THE PATENTDEVELOPMENT COMPANY,

OF PROVIDENCE, RHODE ISLAND,

A CORPORATION QF RHODE ISLAND.

FORGING-MAGHINE.

SPECIFICATION forming part of Letters Patent No. 694,808, dated March 4,1902.

Application filed April 111 1901.

To @ZZ whom t may con/cerro:

Beit known that I, SAMUEL VANs'roNE, a citizen of the United States, anda resident of Providence, in the county of Providence and State of RhodeIsland,have made a certain new and useful Invention in Forging-Machinesgand I declare the following to be a full, clear, and exact descriptionof the same, such as will enable others skilled in the art to which 1oit appertains to make and use the invention, reference being yhad to theaccompanying drawings, and to letters of reference marked thereon, whichform a part of this specification.

This invention has relation to forging-machines, and has for its objectthe provision of a machine of this character which will draw or forgetapers upon the tangs of files or other tools, upon staples, spindles,coach-screws, zo marlin-spikes, and avariety of other articles toonumerous to mention, the taper being 'quickly formed in one operationand in an exactly even manner upon all sides'of the article.

Vith this object in view the invention consists in the novelconstruction and combination of parts, all as hereinafter described, andpointed out in the appended claims.

Referring to the accompanying drawings, Figure l is a top plan view of adouble ma- 3o chine for forming tapers upon the tangs of files; Fig. 2is a top plan view of a single acting machine for the same purpose. Fig.3 is a section on the line 3 3, Fig. 2. Fig. 4: is a detail view showinga single die secured in the end of one of the levers. Fig. 5 is a detailView showing the double die pressed into the heated blank. Fig. 6 isadetail .view showing the position of the dies as the separated blankleaves them.v Fig. 7' is a de- 4o tail view of a round rod or blank foraspindle.

Fig. S shows the same separated in the center by means of a pull or drawand without dies. Fig. 9 shows a iat blank separated in like manner tothe rod above described Fig.

l0 is an edge view of the blank of Fig. 9. Fig. 11 illustrates in detailthe central portion of a tile-blank, in which the shoulders at the baseof the tang are formed therein previously to the operation of themachine thereupon,

5o in which case the dies are dispensed with.

Serial No. 55,378. (No model.)

I will first proceed to describe the double machine.

In the drawings the letter A designates the framework, and B B rotaryshafts at opposite ends thereof, having a beveljgear driving connectionwith the power-shaft b. Upon the table of the machine, at opposite endportions thereof, reciprocate in suitable guideways a, the slides C C,operated by cranlcand-pitman connection c with shafts B and carrying thepattern-cams C' C', which cams commence with a short decided Obliquityat c for the purpose of forming the shoulders at the base of the tangand continuein .a less decided or lower Obliquity for the tapered sidesof the tang.I

D D are horizontally-acting levers piv'oted at d and having rollers d atthe outer eX- tremities oftheir long arms in engagement with thepattern-cams aforesaid and having the inner eXtrem-ities of their shortarms arrangedV to work in slots or recesses e` of the die-heads E E,Which/die-heads are adapted for reciprocation transversely of themachine in suitable guideways 'e.

p D D' are springs acting against the levers D Vto press the rollersthereof into engagement with the pattern-cams.

c2 represents the dies or pressure-plates, forming a part of said headsand presenting oppositely.

F F designate the tongs for grasping the ends of the stock and carriedone pair by each of the slides C, such tongs being of toggle-levercharacter and having the jaws ff beveled at their forward or inner ends.The toggle-levers of the tongs have a common pivot f to the slide. Y l

In operation the blank to be worked is placed upon the rests G G, thedies presenting centrally of the lateral faces of the blank and the endportions of the blank being within reach of the tongs. As the slides C Care moved inwardly toward each other by rotation of the shafts B thetongs F are also moved inwardly, the tapered or rounded graspingfaces ofthe jaws of the tongs allowing them to slip over the end portions of theblank into position for gripping the same, the joint-pin f2 of theforward pair of toggles of each pair 10o of tongs at the same timedropping into a seat f3 in an upwardly-projecting spring-arm f4.

As the shafts B continue to rotate the slides are now withdrawn or movedoutwardly, the retardation of the sprin gs fl actin g against thejoint-pins f2, causing the jaws of the tongs to close upon the stockuntil it is effectively gripped, further Withdrawal of such slides andtongs thus causing the jaws to automatically grip the stock tighter andtighter and at the same time to exert a pulling or drawing actionthereupon to separate the stock in the center thereof which is heatedpreviously. "When the slides and tongs are beginning in theirwithdrawal, the dies are pressed inwardly into the heated blank to formthe shoulders at the base of the tile-tangs, the rounded-edge ribs 4e3of said dies gradually closing upon the metal as it is withdrawntherethrough until such edge ribs come together. Center ribs e4 of thedies aid in parting the metal at the exact center of the blank.

The single-acting machine operates in the same manner as the doublemachine above described, a single slide C, pattern-cam, pair of tongs,dac., being employed, the metal of the blank being in this case notpulled apart in the center of the blank, but an attenuation of the endportion of the blank being effected.

The transversely-reciprocating die-heads may be omitted and the diesinserted directly in the inner end portions of the short arms of thelevers D, as shown in Fig. 4., or the dies may be omitted entirely and ablank employed having the shoulders at the base of the tangs alreadyformed therein or the central portion of the stock cut away, asillustratedn Fig. 1l.

In forming a taper or point upon round or flat bars or spindlesrequiring no shoulders, as in Figs. 7 to 10, inclusive,no dies arerequired. The length of the taper may be regulated by the degree of heatto which the blank is subjected.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a forging-machine, the oppositely-reciprocatory gripping means forboth end portions of the blank, and devices in connection therewith forcausing the grip of both such means to be effected automatically,substantially as specified.

2. In a forging-machine, the reciprocatory gripping means for an endportion of the blank, and devices in connection therewith for causingthe grip of such means to be effected automatically, and gripping meansfor the opposite end portion of the blank, substantially as specified.

3. In a forging-machine, the combination with the reciprocatory grippingmeans for one end portion of the blank, and gripping means for theopposite end portion of the blank, of a pressure or die device for theheated portion of the blank, and means in connection with such device tocause it to be applied automatically, substantially as speciiied.

4. In a forging-machine, the reciprocatory slides, the jaws carried bysaid slides, and arranged to grip both end portions of the blank,

and means in connection with such jaws to cause them to e'ect their gripautomatically, substantially as specified.

5. In a forging-machine, the reciprocatory, gripping means for the endportions of the blank, and the reciprocatory, oppositely-act ing dies orpressure-plates,substantially as specified.

6. In a forging-machine, the reciprocatory slides, the toggle-lever,automatically-acting tongs pivoted to said slides and arranged to gripthe end portions of the blank, and means engaging the joint-pin of saidtongs for extending said toggle-levers to automatically effect theinitial grip, substantially as specified.

'7. In a forging-machine, the reciprocatory cam-slides, automatically-acting jaws carried by said slides and arranged to grip the endportions of the blank, the pivoted levers operated by said slides, andthe reciprocatory dies or pressure-plates operated by said levers,substantially as specified.

8. In a forging-machine, a reciprocatory cam-slide, jaws carried by saidslide and arranged to grip the blank, reciprocatory oppositely-actingdie-heads, carrying the dies, and the pivoted levers actuated by saidslides to reciprocate said die-heads,- substantially as specified.

9. In aforging-machine,the gripping means for the blank, having thetongs, and means engaging the joint-pin of said tongs, for ternporarilyretarding the movement thereof, to effect the initial grip,substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL VANSTONE.-

Witnesses:

PARDON W. TrnLiNcnAsr, JOHN HENSHAW.

ICO

